贵州典型茶园土壤剖面磷素形态及有效性

为了解茶园土壤剖面磷素分布的有效性规律，采用Bowman-Cole有机磷分级方法、张守敬和Jackson无机磷分级方法，对贵州省典型茶园土壤剖面磷素形态及其有效性进行研究。结果表明：茶园土壤剖面各层总无机磷含量占全磷含量的比例为52.19%～68.99%，以铝磷（Al-P）和铁磷（Fe-P）为主，占总无机磷含量的比例分别为44.52%～51.51%、28.19%～36.40%；有机磷以中等活性有机磷（MPo）和中等稳定性有机磷（MRPo）为主，占总有机磷含量的比例分别为44.26%～60.98%、22.00%～27.99%。土壤垂直剖面各层中有效性磷的来源对应于不同磷素形态，有效磷的活性磷源有0～20 cm土层的MPo、20～40 cm和80～100 cm土层的Al-P，重要转换性磷源有0～60 cm土层和80～100 cm土层的MRPo；潜在的非活性磷源有40～60 cm土层的钙磷（Ca-P）和高稳定性有机磷（HRPo）、60～80 cm土层的闭蓄态磷（O-P）、0～40 cm和80～100 cm土层的HRPo；活性有机磷（LPo）的贡献源有0～20 cm土层的Al-P、20～80 ...

Phosphorus forms and availability in soil profiles of typical tea gardens in Guizhou

To understand the availability of phosphorus distribution in soil profiles of Guizhou tea gardens, the forms and availability of phosphorus in soil profiles of typical tea gardens in Guizhou Province were studied using the phosphorus classification methods of BowmanCole and Chang-Jackson. The results showed that the proportion of inorganic phosphorus in the soil profiles of tea gardens was 52.19%- 68.99%, with aluminum phosphorus (Al-P) and ferrophosphorus (Fe-P) as the main contents of 44.52%-51.51% and 28.19%-36.40%, respectively. The organic phosphorus was mainly composed of moderately active organic phosphorus (MPo) and moderately robustness organic phosphorus (MRPo), accounting for 44.26%-60.98% and 22.00%-27.99%, respectively. The sources of available phosphorus in different layers of the vertical profile of soil corresponded to different phosphorus forms. The active phosphorus sources of available phosphorus were MPo in 0-20 cm soil layers, Al-P in 20-40 cm and 80-100 cm soil layers, and MRPo in 0-60 cm soil layer and 80-100 cm soil layer was the important transformable phosphorus sources. The potential non-active phosphorus sources were calcium phosphorus (Ca-P) and highly robustness organic phosphorus (HRPo) in 40-60 cm soil layers. Closed storage phosphorus (O-P) was in 60-80 cm soil layer, and HRPo was in 0-40 cm and 80-100 cm soil layers. The contribution sources of highly active organic phosphorus (LPo) were Al-P in 0-20 cm soil layer, Fe-P in 20-80 cm soil layer, and HRPo in 80-100 cm soil layer. More attention should be paid to the distribution and availability of phosphorus in tea garden soil so that it can be utilized efficiently.